Dad in the Lab: The Science of Fatherhood Quiz

New mothers' brains get a massive dose of bond-inducing oxytocin, and 25 percent of new moms also come down with the postpartum baby blues. Those are just two facts about motherhood that are the offspring of a longstanding outpouring of scientific attention paid to the neurological, physiological and psychological effects of women having babies. But what about how those same bundles of joy impact fathers from the inside out? Put your paternity proficiency under the microscope with this Dad in the Lab Quiz.

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Question 1 of 10

What percentage of male mammals invest long-term, paternal care in their offspring?

5 percent

Fatherhood is a rarity in the animal kingdom -- a mere 5 percent of mammals have evolved invested paternal practices.

55 percent

95 percent

Question 2 of 10

Fatherhood has been correlated with a lower risk of what?

heart disease

Health research has found a correlation between active fatherhood and improved long-term health. For instance, in 2011, a Stanford urologist calculated dads have a 17 percent lower chance of developing fatal heart disease than non-dads.

Alzheimer's disease

prostate cancer

Question 3 of 10

True or false: Men have biological clocks for conceiving.

true

Men don't experience menopause, granted, but studies have found that male fertility certainly declines with age. For instance, semen samples from men over 35 years old contain more damaged sperm, and the rate of birth defects increases with both mothers' and fathers' ages. The cut-off might not be as dramatic for men, but their biological clocks tick-tock, nevertheless.

false

Question 4 of 10

What's the most common symptom of Couvade syndrome, or sympathetic pregnancy?

swollen stomach

back pain

abdominal cramps

Although doctors haven't figured out why many men feel pregnant alongside their expecting partners, research has confirmed that it's a routine occurrence, and abdominal cramps are the most common psychosomatic side effect.

Question 5 of 10

Which of the following is not correlated to fathers doing housework around the home?

Their children have more friends.

The have more frequent sex.

They have decreased parent-child conflict.

According to national survey data analyzed by a pair of University of California, Riverside, sociologists, dads' housework can translate to healthier peer relationships among their children and more frequent sex with their spouses. It didn't, however, find a correlation between cleaning and fewer parent-child squabbles.

Question 6 of 10

Fatherhood can physiologically affect men, elevating levels of all but which hormone?

cortisol

testosterone

New dads who interact with their infants display lower testosterone levels than men with no kids. Studies have found that even the act of holding a baby doll can diminish the amount of testosterone in a man's bloodstream.

prolactin

Question 7 of 10

Which of the following behaviors decreases the most when men become dads for the first time?

smoking

marijuana use

criminal activity

A 19-year study published in November 2011 found that new fatherhood has the most potent effect on mens' criminal activity, and it's also linked with lower smoking, drinking and marijuana use.

About 40 percent of American kids grow up apart from their biological dads. But that doesn't mean they'll miss out on positive paternal parenting. A 2008 study from the University of Wisconsin-Madison found that stepfathers exhibited higher-quality parenting habits than biological fathers, more actively engaging children and assuming greater childcare responsibilities.

Question 9 of 10

Sociological research suggests that which of the following types of couples may make the most invested parents?

heterosexual couples

lesbian couples

gay male couples

In 2010, New York University sociologist Judith Stacey published the results of extensive research on family dynamics and child development outcomes. Based on her findings, Stacey suggested that gay male couples might be the most invested parents, since the social and legal processes required for them to become parents demand the most planning and commitment.

Question 10 of 10

What percent of American fathers experience post-partum depression?

7 percent

About 25 percent of American mothers experience postpartum depression, and new dads aren't immune to the baby blues, either. A 2011 study from the University of Michigan found that 7 percent of new fathers report postpartum depressive symptoms and are three times more likely to spank their babies than non-depressed dads.